Analysis of particulate organic matter distribution along surface waters of the California Current Public

http://ir.library.oregonstate.edu/concern/honors_college_theses/6h440v58s

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  • Water samples along the Washington, Oregon and California coastline were collected using high resolution sampling and analyzed to determine particulate organic carbon and nitrogen concentrations. Over 28 days during August 2011, nearly 1500 samples were collected aboard the R/V Wecoma (W1108C) using a semi-automated filtration system. Additional subsurface samples were collected from CTD casts. In-situ measurements of temperature, salinity, chlorophyll fluorescence, and beam attenuation were combined with the data from individual samples to provide a near-synoptic, spatial distribution of particulate organic matter along the California Current. Marked contrasts in the concentrations and compositions of particulate organic matter were observed among different water masses along the margin, including those directly affected by Columbia River discharge, recently upwelled near-shore waters, and filaments associated with mesoscales eddies. My results demonstrate the utility of high-resolution sampling techniques can be integrated with remote sensing approaches to better understand physical-biological interactions in the coastal ocean. Key Words: California Current, carbon cycling, upwelling, optical sensors
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